

Initial United States postage rates were set by Congress as part of the Postal Service Act signed into law by President George Washington on February 20, 1792. In the 21st century, prices were segmented to match the sorting machinery in use non-standard letters required slightly higher postage. In 1971, the Post Office became the United States Postal Service, with rates set by the Postal Regulatory Commission, with some oversight by Congress. The logo for the Post Office Department showed a man on a running horse, even as the railroads and then motorized trucks and airplanes moved mail. Comparing the increases with a price index, the price of a first class stamp has been steady. Rates were relatively unchanged until 1968, when the price was increased every few years by a small amount. In the middle of the 19th century, rates stabilized to one price regardless of distance. Rates were based on the distance between sender and receiver in the early years of the nation. The system for mail delivery in the United States has developed with the nation. Post Office Department (1792–1971), predecessor to the United States Postal Service Aspect of history Seal of the former U.S.
